William mayer



No. 607,869. Patented luly 26, |898.

W. MAYER.

INGOT MULD.

[ (Application filed July 30, 1895.) (No Model.)

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UNITED STATES- PATENT Trios.

IVILLIAM MAYER, OF .IARROlV-ON-TYNE, ENGLAND.

lNeoT-MOLD.`

SPECIFICATION forming part of Letters Patent No. 607,869, dated July 26,1898. Application filed .Tuly 30, 1895. Serial No. 557,568. (No model.)Patented in England .Tune 30, 1893,1To. 12,798.

To all whom t may concern:

Be it known that I, WILLIAM MAYER, a subject of the Queen of GreatBritain, residing at Jarrow-on-Tyne, in the county of Durham, England,have invented certain new and useful Improvements in Ingot-Molds, (forwhich I have obtained British Letters Patent No. 12,798, dated June 30,1893,) which improvements are fully set forth in the followingspecification and accompanying drawings, where- 1n- Figure l is acentral vertical section of an ingot-mold embodying my improvements, thesection being taken on line wot' Fig. 2. Fig. 2 is a top plan view ofsame.

Similar reference-letters denote like parts in both views.

This invention relates generally to improvements in that class ofdevices known as molds, the same being employed in producing or formingvarious objects from molten metals. Ithas special reference, however, toto molds designed for use in the production from molten steel ofarticles commonly known as ingots Heretofore ingot-molds have in most,it not all, instances been provided with walls having plane outersurfaces. The life of such a mold under continuous use is usuallylimited to less than twenty days,- for the reason that in service it isnecessarily abruptly subjected to extreme variations in temperature, andthis results in so seriously warping or distorting the mold as to renderit entirely inoperative in a very short period of time. The chief objectof my invention is to overcome as fully as practicable thisobjectionable feature of molds of the prior art and through theemployment of a base-plate of somewhat peculiar form attain additionaladvantages to be hereinafter pointed out.

My invention consists in varying the thickness of the walls of the moldproper, in providing the mold proper with a peculiarlyformed base-plate,in certain combinations, and in certain details of construction, all ofwhich will be specifically referred to hereinafter.

Having reference to the accompanying drawings, the letterA denotes themold proper, ordinarilyquadrangular in cross-section and formed from anysuitable material, as castiron. The inside dimensions of this mold areslightly less at the top than at the bottom thereof-that is,pyramidal ingeneral outline, as in common practice and for purposes well understood.The material from which the mold A is formed is distributed in a mannerthat secures for the respective walls of the mold a thickness increasingwith substantial regularity from a point about midway thereof to therespective upper and lower ends thereof. In other words, each of theVrespective walls of the mold may be said to be transversely concaved,and the concavity should be such as to diminish the thickness of thewall at or slightly` below a point midway between the given thickness atthe respective ends thereof. top and bottom thereof to about one-halfthe B are the ears commonly applied to molds of this description forconvenience in handling. Y

In the absence of a base-plate the sand into which the mold is placed inthe operation of molding has a tendency to rise and mingle toan'undesirable extent with the molten steel upon the latter being pouredinto the mold A, the result being that the lower end of the ingot afterremoval from the mold usually contains more or less sand, which isobjectionable. To overcome this, I provide a baseplate C, formed of anysuitable material, as cast-iron, and provided with a vertical rib or lipa. This lip is readily formedintegral with the base C and is adapted totake over the lower end of the mold A. Central within the spacesurrounded by the lip a there is a recess or depression b, coincidingwith the inside dimensions of the lower end of the lnold A. The mold Amay, however, be used either with or without a base-plate, as desired.

The lip a on the base-plate C serves to prevent shifting or lateraldisplacement of the mold A upon the base-plate C, and the central recessb serves to give adesirable form to the lower end of the ingot, in theproduction of which the base-plate is used.

In practice the mold A is placedupon the plate C so that the lip willsurround the lower end of the mold.` The molten steel` is now pouredinto the mold-at the top. 'Ihe heat from the same penetrates each wallof the mold, the thinner portions of the walls being raised to a highertemperature than the IOO

